<template>
  <div :class="className" :style="{height:height,width:width}"/>
</template>

<script>
import * as echarts from 'echarts'
require('echarts/theme/macarons') // echarts theme
import { debounce } from '@/utils'
import order from '@/api/business/Order'
import checkPermission from '@/utils/permission'

export default {
  checkPermission,
  props: {
    className: {
      type: String,
      default: 'chart'
    },
    width: {
      type: String,
      default: '100%'
    },
    height: {
      type: String,
      default: '350px'
    },
    autoResize: {
      type: Boolean,
      default: true
    }
  },
  data() {
    return {
      chart: null,
      sidebarElm: null,
      chartData: {
        saleData: [] // [1000, 2000, 3000],
      },
      busDateMonths: [] // ['2020-05-13', '2020-05-19', '2020-05-26']
    }
  },
  mounted() {
    this.initChart()
    if (this.autoResize) {
      this.__resizeHandler = debounce(() => {
        if (this.chart) {
          this.chart.resize()
        }
      }, 100)
      window.addEventListener('resize', this.__resizeHandler)
    }

    // 监听侧边栏的变化
    this.sidebarElm = document.getElementsByClassName('sidebar-container')[0]
    this.sidebarElm && this.sidebarElm.addEventListener('transitionend', this.sidebarResizeHandler)
  },
  beforeDestroy() {
    if (!this.chart) {
      return
    }
    if (this.autoResize) {
      window.removeEventListener('resize', this.__resizeHandler)
    }

    this.sidebarElm && this.sidebarElm.removeEventListener('transitionend', this.sidebarResizeHandler)

    this.chart.dispose()
    this.chart = null
  },
  methods: {
    sidebarResizeHandler(e) {
      if (e.propertyName === 'width') {
        this.__resizeHandler()
      }
    },
    setOptions({ saleData } = {}) {
      this.chart.setOption({
        xAxis: {
          alignWithLabel: true,
          name: '年/月',
          data: this.busDateMonths,
          boundaryGap: false,
          axisTick: {
            show: false
          },
          axisLabel: {
            showMaxLabel: true
          }
        },
        grid: {
          left: 10,
          right: 10,
          bottom: 20,
          top: 30,
          containLabel: true
        },
        tooltip: {
          trigger: 'axis',
          axisPointer: {
            type: 'cross'
          },
          padding: [5, 10]
        },
        yAxis: {
          axisTick: {
            show: false
          }
        },
        legend: {
          data: ['近半年销售额(按月)']
        },
        series: [{
          name: '近半年销售额(按月)', itemStyle: {
            normal: {
              color: '#FF005A',
              lineStyle: {
                color: '#FF005A',
                width: 2
              }
            }
          },
          smooth: true,
          type: 'line',
          data: saleData,
          animationDuration: 2800,
          animationEasing: 'cubicInOut'
        }]
      })
    },
    initChart() {
      if (checkPermission(['SYS_ADMIN', 'COMMON_ADMIN', 'DASHBOARD_SALE_INFO'])) {
        this.chart = echarts.init(this.$el, 'macarons')
        order.getRequestByName('getOrderMonthStat', null).then(res => {
          const tmpList = res.data
          const tmpDateMonths = []
          const tmpSaleData = []
          tmpList.forEach(tmpvo => {
            tmpDateMonths.push(tmpvo.busDateMonth)
            tmpSaleData.push(tmpvo.totalMoney)
          })
          this.busDateMonths = tmpDateMonths
          this.chartData.saleData = tmpSaleData
          this.setOptions(this.chartData)
        })
      }
    }
  }
}
</script>
